aa95c5b148
Reference objects changed from ACPI_TYPE_ANY to ACPI_TYPE_LOCAL_REFERENCE in Oct. 2002, this may help systems where switching the cooler on failed. We support both types for now until this sorts out.
666 lines
20 KiB
C
666 lines
20 KiB
C
/*-
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* Copyright (c) 2001 Michael Smith
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/bus.h>
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#include "acpi.h"
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#include <dev/acpica/acpivar.h>
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/*
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* ACPI power resource management.
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*
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* Power resource behaviour is slightly complicated by the fact that
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* a single power resource may provide power for more than one device.
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* Thus, we must track the device(s) being powered by a given power
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* resource, and only deactivate it when there are no powered devices.
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*
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* Note that this only manages resources for known devices. There is an
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* ugly case where we may turn of power to a device which is in use because
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* we don't know that it depends on a given resource. We should perhaps
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* try to be smarter about this, but a more complete solution would involve
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* scanning all of the ACPI namespace to find devices we're not currently
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* aware of, and this raises questions about whether they should be left
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* on, turned off, etc.
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*
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* XXX locking
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*/
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MALLOC_DEFINE(M_ACPIPWR, "acpipwr", "ACPI power resources");
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/* Hooks for the ACPI CA debugging infrastructure */
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#define _COMPONENT ACPI_POWERRES
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ACPI_MODULE_NAME("POWERRES")
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/* Return values from _STA on a power resource */
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#define ACPI_PWR_OFF 0
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#define ACPI_PWR_ON 1
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/* A relationship between a power resource and a consumer. */
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struct acpi_powerreference {
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struct acpi_powerconsumer *ar_consumer;
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struct acpi_powerresource *ar_resource;
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TAILQ_ENTRY(acpi_powerreference) ar_rlink; /* link on resource list */
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TAILQ_ENTRY(acpi_powerreference) ar_clink; /* link on consumer */
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};
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/* A power-managed device. */
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struct acpi_powerconsumer {
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/* Device which is powered */
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ACPI_HANDLE ac_consumer;
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int ac_state;
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TAILQ_ENTRY(acpi_powerconsumer) ac_link;
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TAILQ_HEAD(,acpi_powerreference) ac_references;
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};
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/* A power resource. */
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struct acpi_powerresource {
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TAILQ_ENTRY(acpi_powerresource) ap_link;
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TAILQ_HEAD(,acpi_powerreference) ap_references;
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ACPI_HANDLE ap_resource;
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ACPI_INTEGER ap_systemlevel;
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ACPI_INTEGER ap_order;
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};
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static TAILQ_HEAD(acpi_powerresource_list, acpi_powerresource)
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acpi_powerresources;
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static TAILQ_HEAD(acpi_powerconsumer_list, acpi_powerconsumer)
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acpi_powerconsumers;
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static ACPI_STATUS acpi_pwr_register_consumer(ACPI_HANDLE consumer);
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static ACPI_STATUS acpi_pwr_deregister_consumer(ACPI_HANDLE consumer);
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static ACPI_STATUS acpi_pwr_register_resource(ACPI_HANDLE res);
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static ACPI_STATUS acpi_pwr_deregister_resource(ACPI_HANDLE res);
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static void acpi_pwr_reference_resource(ACPI_OBJECT *obj,
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void *arg);
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static ACPI_STATUS acpi_pwr_switch_power(void);
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static struct acpi_powerresource
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*acpi_pwr_find_resource(ACPI_HANDLE res);
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static struct acpi_powerconsumer
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*acpi_pwr_find_consumer(ACPI_HANDLE consumer);
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/* Initialise our lists. */
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static void
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acpi_pwr_init(void *junk)
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{
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TAILQ_INIT(&acpi_powerresources);
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TAILQ_INIT(&acpi_powerconsumers);
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}
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SYSINIT(acpi_powerresource, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_pwr_init, NULL);
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/*
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* Register a power resource.
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*
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* It's OK to call this if we already know about the resource.
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*/
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static ACPI_STATUS
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acpi_pwr_register_resource(ACPI_HANDLE res)
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{
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ACPI_STATUS status;
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ACPI_BUFFER buf;
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ACPI_OBJECT *obj;
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struct acpi_powerresource *rp, *srp;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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rp = NULL;
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buf.Pointer = NULL;
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/* Look to see if we know about this resource */
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if (acpi_pwr_find_resource(res) != NULL)
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return_ACPI_STATUS (AE_OK); /* already know about it */
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/* Allocate a new resource */
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if ((rp = malloc(sizeof(*rp), M_ACPIPWR, M_NOWAIT | M_ZERO)) == NULL) {
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status = AE_NO_MEMORY;
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goto out;
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}
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TAILQ_INIT(&rp->ap_references);
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rp->ap_resource = res;
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/* Get the Power Resource object */
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buf.Length = ACPI_ALLOCATE_BUFFER;
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if (ACPI_FAILURE(status = AcpiEvaluateObject(res, NULL, NULL, &buf))) {
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "no power resource object\n"));
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goto out;
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}
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obj = buf.Pointer;
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if (obj->Type != ACPI_TYPE_POWER) {
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
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"questionable power resource object %s\n",
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acpi_name(res)));
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status = AE_TYPE;
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goto out;
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}
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rp->ap_systemlevel = obj->PowerResource.SystemLevel;
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rp->ap_order = obj->PowerResource.ResourceOrder;
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/* Sort the resource into the list */
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status = AE_OK;
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srp = TAILQ_FIRST(&acpi_powerresources);
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if (srp == NULL || rp->ap_order < srp->ap_order) {
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TAILQ_INSERT_HEAD(&acpi_powerresources, rp, ap_link);
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goto done;
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}
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TAILQ_FOREACH(srp, &acpi_powerresources, ap_link) {
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if (rp->ap_order < srp->ap_order) {
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TAILQ_INSERT_BEFORE(srp, rp, ap_link);
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goto done;
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}
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}
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TAILQ_INSERT_TAIL(&acpi_powerresources, rp, ap_link);
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done:
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
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"registered power resource %s\n", acpi_name(res)));
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out:
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if (buf.Pointer != NULL)
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AcpiOsFree(buf.Pointer);
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if (ACPI_FAILURE(status) && rp != NULL)
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free(rp, M_ACPIPWR);
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return_ACPI_STATUS (status);
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}
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/*
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* Deregister a power resource.
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*/
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static ACPI_STATUS
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acpi_pwr_deregister_resource(ACPI_HANDLE res)
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{
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struct acpi_powerresource *rp;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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rp = NULL;
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/* Find the resource */
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if ((rp = acpi_pwr_find_resource(res)) == NULL)
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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/* Check that there are no consumers referencing this resource */
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if (TAILQ_FIRST(&rp->ap_references) != NULL)
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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/* Pull it off the list and free it */
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TAILQ_REMOVE(&acpi_powerresources, rp, ap_link);
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free(rp, M_ACPIPWR);
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "deregistered power resource %s\n",
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acpi_name(res)));
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Register a power consumer.
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*
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* It's OK to call this if we already know about the consumer.
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*/
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static ACPI_STATUS
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acpi_pwr_register_consumer(ACPI_HANDLE consumer)
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{
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struct acpi_powerconsumer *pc;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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/* Check to see whether we know about this consumer already */
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if ((pc = acpi_pwr_find_consumer(consumer)) != NULL)
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return_ACPI_STATUS (AE_OK);
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/* Allocate a new power consumer */
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if ((pc = malloc(sizeof(*pc), M_ACPIPWR, M_NOWAIT)) == NULL)
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return_ACPI_STATUS (AE_NO_MEMORY);
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TAILQ_INSERT_HEAD(&acpi_powerconsumers, pc, ac_link);
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TAILQ_INIT(&pc->ac_references);
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pc->ac_consumer = consumer;
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/* XXX we should try to find its current state */
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pc->ac_state = ACPI_STATE_UNKNOWN;
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "registered power consumer %s\n",
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acpi_name(consumer)));
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Deregister a power consumer.
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*
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* This should only be done once the consumer has been powered off.
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* (XXX is this correct? Check once implemented)
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*/
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static ACPI_STATUS
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acpi_pwr_deregister_consumer(ACPI_HANDLE consumer)
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{
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struct acpi_powerconsumer *pc;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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/* Find the consumer */
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if ((pc = acpi_pwr_find_consumer(consumer)) == NULL)
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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/* Make sure the consumer's not referencing anything right now */
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if (TAILQ_FIRST(&pc->ac_references) != NULL)
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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/* Pull the consumer off the list and free it */
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TAILQ_REMOVE(&acpi_powerconsumers, pc, ac_link);
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "deregistered power consumer %s\n",
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acpi_name(consumer)));
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Set a power consumer to a particular power state.
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*/
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ACPI_STATUS
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acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state)
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{
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struct acpi_powerconsumer *pc;
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struct acpi_powerreference *pr;
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ACPI_HANDLE method_handle, reslist_handle, pr0_handle;
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ACPI_BUFFER reslist_buffer;
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ACPI_OBJECT *reslist_object;
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ACPI_STATUS status;
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char *method_name, *reslist_name;
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int res_changed;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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/* Find the consumer */
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if ((pc = acpi_pwr_find_consumer(consumer)) == NULL) {
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if (ACPI_FAILURE(status = acpi_pwr_register_consumer(consumer)))
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return_ACPI_STATUS (status);
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if ((pc = acpi_pwr_find_consumer(consumer)) == NULL) {
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return_ACPI_STATUS (AE_ERROR); /* something very wrong */
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}
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}
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/* Check for valid transitions */
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if (pc->ac_state == ACPI_STATE_D3 && state != ACPI_STATE_D0)
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return_ACPI_STATUS (AE_BAD_PARAMETER); /* can only go to D0 from D3 */
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/* Find transition mechanism(s) */
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switch(state) {
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case ACPI_STATE_D0:
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method_name = "_PS0";
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reslist_name = "_PR0";
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break;
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case ACPI_STATE_D1:
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method_name = "_PS1";
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reslist_name = "_PR1";
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break;
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case ACPI_STATE_D2:
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method_name = "_PS2";
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reslist_name = "_PR2";
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break;
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case ACPI_STATE_D3:
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method_name = "_PS3";
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reslist_name = "_PR3";
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break;
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default:
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "setup to switch %s D%d -> D%d\n",
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acpi_name(consumer), pc->ac_state, state));
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/*
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* Verify that this state is supported, ie. one of method or
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* reslist must be present. We need to do this before we go
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* dereferencing resources (since we might be trying to go to
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* a state we don't support).
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*
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* Note that if any states are supported, the device has to
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* support D0 and D3. It's never an error to try to go to
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* D0.
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*/
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reslist_buffer.Pointer = NULL;
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reslist_object = NULL;
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if (ACPI_FAILURE(AcpiGetHandle(consumer, method_name, &method_handle)))
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method_handle = NULL;
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if (ACPI_FAILURE(AcpiGetHandle(consumer, reslist_name, &reslist_handle)))
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reslist_handle = NULL;
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if (reslist_handle == NULL && method_handle == NULL) {
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if (state == ACPI_STATE_D0) {
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pc->ac_state = ACPI_STATE_D0;
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return_ACPI_STATUS (AE_OK);
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}
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if (state != ACPI_STATE_D3)
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goto bad;
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/* Turn off the resources listed in _PR0 to go to D3. */
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if (ACPI_FAILURE(AcpiGetHandle(consumer, "_PR0", &pr0_handle)))
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goto bad;
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reslist_buffer.Length = ACPI_ALLOCATE_BUFFER;
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status = AcpiEvaluateObject(pr0_handle, NULL, NULL, &reslist_buffer);
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if (ACPI_FAILURE(status))
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goto bad;
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reslist_object = (ACPI_OBJECT *)reslist_buffer.Pointer;
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if (reslist_object->Type != ACPI_TYPE_PACKAGE ||
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reslist_object->Package.Count == 0) {
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goto bad;
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}
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AcpiOsFree(reslist_buffer.Pointer);
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reslist_buffer.Pointer = NULL;
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reslist_object = NULL;
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}
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/*
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* Check that we can actually fetch the list of power resources
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*/
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if (reslist_handle != NULL) {
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reslist_buffer.Length = ACPI_ALLOCATE_BUFFER;
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status = AcpiEvaluateObject(reslist_handle, NULL, NULL,
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&reslist_buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
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"can't evaluate resource list %s\n",
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acpi_name(reslist_handle)));
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goto out;
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}
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reslist_object = (ACPI_OBJECT *)reslist_buffer.Pointer;
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if (reslist_object->Type != ACPI_TYPE_PACKAGE) {
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
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"resource list is not ACPI_TYPE_PACKAGE (%d)\n",
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reslist_object->Type));
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status = AE_TYPE;
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goto out;
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}
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}
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/*
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* Now we are ready to switch, so kill off any current power
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* resource references.
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*/
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res_changed = 0;
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while((pr = TAILQ_FIRST(&pc->ac_references)) != NULL) {
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res_changed = 1;
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "removing reference to %s\n",
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acpi_name(pr->ar_resource->ap_resource)));
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TAILQ_REMOVE(&pr->ar_resource->ap_references, pr, ar_rlink);
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TAILQ_REMOVE(&pc->ac_references, pr, ar_clink);
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free(pr, M_ACPIPWR);
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}
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/*
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* Add new power resource references, if we have any. Traverse the
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* package that we got from evaluating reslist_handle, and look up each
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* of the resources that are referenced.
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*/
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if (reslist_object != NULL) {
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "referencing %d new resources\n",
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reslist_object->Package.Count));
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acpi_ForeachPackageObject(reslist_object, acpi_pwr_reference_resource,
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pc);
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res_changed = 1;
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}
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/*
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* If we changed anything in the resource list, we need to run a switch
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* pass now.
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*/
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if (ACPI_FAILURE(status = acpi_pwr_switch_power())) {
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
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"failed to switch resources from %s to D%d\n",
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acpi_name(consumer), state));
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/* XXX is this appropriate? Should we return to previous state? */
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goto out;
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}
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/* Invoke power state switch method (if present) */
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if (method_handle != NULL) {
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
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"invoking state transition method %s\n",
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acpi_name(method_handle)));
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status = AcpiEvaluateObject(method_handle, NULL, NULL, NULL);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "failed to set state - %s\n",
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AcpiFormatException(status)));
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pc->ac_state = ACPI_STATE_UNKNOWN;
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/* XXX Should we return to previous state? */
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goto out;
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}
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}
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/* Transition was successful */
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pc->ac_state = state;
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return_ACPI_STATUS (AE_OK);
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bad:
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ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
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"attempt to set unsupported state D%d\n", state));
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status = AE_BAD_PARAMETER;
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out:
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if (reslist_buffer.Pointer != NULL)
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AcpiOsFree(reslist_buffer.Pointer);
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return_ACPI_STATUS (status);
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}
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/*
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* Called to create a reference between a power consumer and a power resource
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* identified in the object.
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*/
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static void
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acpi_pwr_reference_resource(ACPI_OBJECT *obj, void *arg)
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{
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struct acpi_powerconsumer *pc = (struct acpi_powerconsumer *)arg;
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struct acpi_powerreference *pr;
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struct acpi_powerresource *rp;
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ACPI_HANDLE res;
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|
ACPI_STATUS status;
|
|
|
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
|
|
|
res = acpi_GetReference(NULL, obj);
|
|
if (res == NULL) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
|
|
"can't create a power reference for object type %d\n",
|
|
obj->Type));
|
|
return_VOID;
|
|
}
|
|
|
|
/* Create/look up the resource */
|
|
if (ACPI_FAILURE(status = acpi_pwr_register_resource(res))) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
|
|
"couldn't register power resource %s - %s\n",
|
|
obj->String.Pointer, AcpiFormatException(status)));
|
|
return_VOID;
|
|
}
|
|
if ((rp = acpi_pwr_find_resource(res)) == NULL) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "power resource list corrupted\n"));
|
|
return_VOID;
|
|
}
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "found power resource %s\n",
|
|
acpi_name(rp->ap_resource)));
|
|
|
|
/* Create a reference between the consumer and resource */
|
|
if ((pr = malloc(sizeof(*pr), M_ACPIPWR, M_NOWAIT | M_ZERO)) == NULL) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
|
|
"allocation failed for a power consumer reference\n"));
|
|
return_VOID;
|
|
}
|
|
pr->ar_consumer = pc;
|
|
pr->ar_resource = rp;
|
|
TAILQ_INSERT_TAIL(&pc->ac_references, pr, ar_clink);
|
|
TAILQ_INSERT_TAIL(&rp->ap_references, pr, ar_rlink);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*
|
|
* Switch power resources to conform to the desired state.
|
|
*
|
|
* Consumers may have modified the power resource list in an arbitrary
|
|
* fashion; we sweep it in sequence order.
|
|
*/
|
|
static ACPI_STATUS
|
|
acpi_pwr_switch_power(void)
|
|
{
|
|
struct acpi_powerresource *rp;
|
|
ACPI_STATUS status;
|
|
int cur;
|
|
|
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
|
|
|
/*
|
|
* Sweep the list forwards turning things on.
|
|
*/
|
|
TAILQ_FOREACH(rp, &acpi_powerresources, ap_link) {
|
|
if (TAILQ_FIRST(&rp->ap_references) == NULL) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
|
|
"%s has no references, not turning on\n",
|
|
acpi_name(rp->ap_resource)));
|
|
continue;
|
|
}
|
|
|
|
/* We could cache this if we trusted it not to change under us */
|
|
status = acpi_GetInteger(rp->ap_resource, "_STA", &cur);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get status of %s - %d\n",
|
|
acpi_name(rp->ap_resource), status));
|
|
|
|
/* XXX is this correct? Always switch if in doubt? */
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Switch if required. Note that we ignore the result of the switch
|
|
* effort; we don't know what to do if it fails, so checking wouldn't
|
|
* help much.
|
|
*/
|
|
if (cur != ACPI_PWR_ON) {
|
|
status = AcpiEvaluateObject(rp->ap_resource, "_ON", NULL, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
|
|
"failed to switch %s on - %s\n",
|
|
acpi_name(rp->ap_resource),
|
|
AcpiFormatException(status)));
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "switched %s on\n",
|
|
acpi_name(rp->ap_resource)));
|
|
}
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "%s is already on\n",
|
|
acpi_name(rp->ap_resource)));
|
|
}
|
|
}
|
|
|
|
/* Sweep the list backwards turning things off. */
|
|
TAILQ_FOREACH_REVERSE(rp, &acpi_powerresources, acpi_powerresource_list,
|
|
ap_link) {
|
|
|
|
if (TAILQ_FIRST(&rp->ap_references) != NULL) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
|
|
"%s has references, not turning off\n",
|
|
acpi_name(rp->ap_resource)));
|
|
continue;
|
|
}
|
|
|
|
/* We could cache this if we trusted it not to change under us */
|
|
status = acpi_GetInteger(rp->ap_resource, "_STA", &cur);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get status of %s - %d\n",
|
|
acpi_name(rp->ap_resource), status));
|
|
/* XXX is this correct? Always switch if in doubt? */
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Switch if required. Note that we ignore the result of the switch
|
|
* effort; we don't know what to do if it fails, so checking wouldn't
|
|
* help much.
|
|
*/
|
|
if (cur != ACPI_PWR_OFF) {
|
|
status = AcpiEvaluateObject(rp->ap_resource, "_OFF", NULL, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
|
|
"failed to switch %s off - %s\n",
|
|
acpi_name(rp->ap_resource),
|
|
AcpiFormatException(status)));
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "switched %s off\n",
|
|
acpi_name(rp->ap_resource)));
|
|
}
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "%s is already off\n",
|
|
acpi_name(rp->ap_resource)));
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Find a power resource's control structure.
|
|
*/
|
|
static struct acpi_powerresource *
|
|
acpi_pwr_find_resource(ACPI_HANDLE res)
|
|
{
|
|
struct acpi_powerresource *rp;
|
|
|
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
|
|
|
TAILQ_FOREACH(rp, &acpi_powerresources, ap_link) {
|
|
if (rp->ap_resource == res)
|
|
break;
|
|
}
|
|
|
|
return_PTR (rp);
|
|
}
|
|
|
|
/*
|
|
* Find a power consumer's control structure.
|
|
*/
|
|
static struct acpi_powerconsumer *
|
|
acpi_pwr_find_consumer(ACPI_HANDLE consumer)
|
|
{
|
|
struct acpi_powerconsumer *pc;
|
|
|
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
|
|
|
TAILQ_FOREACH(pc, &acpi_powerconsumers, ac_link) {
|
|
if (pc->ac_consumer == consumer)
|
|
break;
|
|
}
|
|
|
|
return_PTR (pc);
|
|
}
|